161525616 has 40 divisors (see below), whose sum is σ = 476886144. Its totient is φ = 46150080.

The previous prime is 161525597. The next prime is 161525633. The reversal of 161525616 is 616525161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240030 + ... + 240701.

Almost surely, 2^161525616 is an apocalyptic number.

161525616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161525616 is an abundant number, since it is smaller than the sum of its proper divisors (315360528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161525616 is a wasteful number, since it uses less digits than its factorization.

161525616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480749 (or 480743 counting only the distinct ones).

The product of its digits is 10800, while the sum is 33.

The square root of 161525616 is about 12709.2728352176. The cubic root of 161525616 is about 544.6035508641.

The spelling of 161525616 in words is "one hundred sixty-one million, five hundred twenty-five thousand, six hundred sixteen".